CN116868079B - Zero phase calibration method, computer device and storage medium - Google Patents

Abstract

A zero-phase calibration method, comprising: selecting a group of combinations with the same measuring range and a group of adjacent measuring range combinations formed by the measuring range and the adjacent and smaller measuring range between different channels of the wide-range instrument, measuring phase calibration parameters between channel signals of the group of combinations with the same measuring range and the group of adjacent measuring range combinations, storing the measured phase calibration parameters in a memory, calling the measured phase calibration parameters stored in the memory to calculate the phase calibration parameters between the channel signals of the rest of each measuring range combination of the wide-range instrument step by step, storing the calculated phase calibration parameters in the memory, and calling the corresponding phase calibration parameters stored in the memory to calibrate phase zero points between different channel signals of the wide-range instrument when the wide-range instrument is calibrated.

Description

Zero phase calibration method, computer equipment and storage media

Technical field

This application relates to the field of phase calibration. Specifically, it relates to a zero-phase calibration method, computer equipment and storage media.

Background technique

Wide-range instruments such as vector voltage analyzers combined with voltage or current range extenders enable multi-channel voltage or current ratio, phase difference measurements, and power measurements with combined voltage and current channels. This type of instrument usually needs to be calibrated to the channel voltage/current rms value and inter-channel phase difference error before use to ensure measurement accuracy. At present, the channel phase difference calibration of vector voltage analyzers and other multi-channel measuring instruments (such as phase meters) generally uses a high-stability, low-noise, high-precision signal source with adjustable amplitude and frequency, using a voltage divider or shunt. method to directly calibrate the zero phase point. Due to the large number of channels and ranges of wide-range instruments, there are many range combinations that need to be calibrated. Current calibration methods mostly use manual calibration, which is inefficient, low-precision, and has a long calibration cycle. Some automatic calibration methods require scanning all range combinations, making the calibration process very time-consuming.

In addition, if there is a combination of large range and small range with a large span between different channels when measuring a wide range instrument, it is limited due to the need to introduce a voltage divider or shunt to obtain a small amplitude signal and input it into the small range channel for initial calibration. Due to the phase-frequency characteristics of the voltage divider or shunt, this calibration method cannot achieve high-precision phase quantity transmission.

Therefore, existing phase calibration methods cannot meet the accuracy and efficiency requirements of phase-frequency calibration of wide-range instruments.

Contents of the invention

According to various embodiments disclosed in the present application, a zero-phase calibration method, a computer device, and a storage medium are provided.

A zero-phase calibration method used to calibrate the phase zero point between different channel signals of a wide-range instrument. The method includes:

Step S1, between different channels A and channel B of the wide-range instrument, select a group of combinations with the same range, as well as a group of adjacent range combinations composed of a range and a smaller range adjacent to the range, and measure Phase calibration parameters between a group of channel signals of the same range combination and between a group of channel signals of adjacent range combinations;

Step S2: Complete the measurement of the phase calibration parameters of all groups of combinations of the same range and groups of adjacent range combinations, and store the measured phase calibration parameters in the memory;

Step S3, call the measured phase calibration parameters stored in the memory, and gradually calculate the phase calibration parameters between the channel signals of the remaining range combinations of the wide-range instrument;

Step S4, store the phase calibration parameters calculated in step S3 in the memory; and

Step S5, when calibrating the wide-range instrument, call the corresponding phase calibration parameters stored in the memory to calibrate the phase zero points between different channel signals of the wide-range instrument.

A computer device, including a memory and one or more processors. Computer readable instructions are stored in the memory. When the computer readable instructions are executed by one or more processors, the zero phase calibration provided in any embodiment of the present application is implemented. Method steps.

One or more non-volatile computer-readable storage media storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, they cause the one or more processors to implement any embodiment of the present application. Provides steps for the zero phase calibration method. The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features and advantages of the application will be apparent from the description, drawings, and claims.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

FIG. 1 is a schematic connection diagram for zero-phase calibration of a large-range channel and a small-range channel of a vector voltage analyzer using a voltage divider according to the prior art in one or more embodiments.

FIG. 2 is a schematic diagram of an application environment of a zero-phase calibration method according to one or more embodiments.

3 is a schematic diagram of a calibration environment according to a zero-phase calibration method in one or more embodiments.

Figure 4 is a flowchart of a zero phase calibration method according to one or more embodiments.

FIG. 5 is a matrix diagram of phase calibration parameters between channel signals of each range combination when calibrating according to the zero-phase calibration method in one or more embodiments.

Detailed ways

In order to make the technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

Referring to Figure 1, Figure 1 is a schematic connection diagram of the prior art for zero-phase calibration of the large-range channel and the small-range channel of the vector voltage analyzer by means of a voltage divider. As shown in Figure 1, when measuring with the vector voltage analyzer, there is a combination of 5V large range and 2mV small range between different channels CH _A and CH _B. The initial calibration outputs two full-scale channels of 5V large range through a high-precision signal source. Amplitude signal, one signal is directly input into the 5V large-range channel CH _A of the vector voltage analyzer to be calibrated, and the other signal is introduced into a voltage divider to obtain a small amplitude signal of 2mV small range to be input into the vector voltage analyzer to be calibrated. 2mV small range channel CH _B. However, limited by the phase-frequency characteristics of the voltage divider, this calibration method cannot achieve high-precision phase quantity transmission. In addition, for other range combinations with a large span between vector voltage analyzer channels, it is necessary to use a voltage divider to obtain the corresponding small amplitude signal and input it into the small range channel for initial calibration, which makes the calibration process very time-consuming.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application, so that the purpose and advantages of the present application will be more clearly understood. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments.

Referring to Figure 2, Figure 2 is a schematic diagram of the application environment of the zero phase calibration method provided by an embodiment of the present application. In the application environment as shown in Figure 2, the computer device can be a server, and its internal structure diagram can be as shown in Figure 2. The computer device includes a processor, memory, interfaces and databases connected through a system bus. Wherein, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes non-volatile storage media and internal memory. The non-volatile storage medium stores an operating system, computer-readable instructions and a database. This internal memory provides an environment for the execution of an operating system and computer-readable instructions in a non-volatile storage medium. The database of the computer device is used to store data for the zero phase calibration method. The interface of the computer device is used for communication with external terminals. The computer readable instructions, when executed by the processor, can implement the zero phase calibration method.

Referring to Figure 3, Figure 3 is a schematic diagram of the calibration environment of the zero-phase calibration method provided by an embodiment of the present application. In the calibration environment as shown in Figure 3, automatic calibration of the phase zero points between different channels of the wide-range instrument 2 is realized through the computer device 1. The computer device 1 is similar to the computer device shown in FIG. 2 and will not be described again here.

In the embodiment shown in FIG. 3 , the calibration of the phase zero point between two different channels CH _A and CH _B of the wide-range instrument 2 is performed by means of the computer device 1 to perform zero phase calibration as claimed in the present application. Method controls standard source 3 to automatically perform calibration. Wide-range instrument 2 is an instrument with a wide range and multiple signal channels, including but not limited to vector voltage analyzer, phase meter, three-phase standard energy meter, etc. This type of instrument has more than two signal channels, and each channel has There are multiple range files and the range amplitudes of the corresponding range files of each channel are equal. For example, the range amplitudes of the i-th range of channel CH _A and the i-th range of channel CH _B are equal. Standard source 3 is a high-precision signal source with high stability, low noise and adjustable amplitude and frequency, such as the multifunctional calibrator model TD1880 developed by the applicant of this application.

Concept of this application

The basic principle of this application is that for the two different channels CH _A and channel CH _B of the wide-range instrument 2, select the i1 range and i2 range of channel CH _A , and the j1 range and j2 range of channel CH _B , and the combination of each range The phase calibration parameters (phase difference) between the channel signals S _A and S _B form a second-order matrix as shown in Table 1. The calculation formulas of the phase calibration parameters between the channel signals S _A and S _B of each range combination are as shown in formula (1) to formula (4) respectively.

Table 1: Channel range combination matrix

PHS _A S _B (i1,j1) = PHS _B [j1] - PHS _A [i1]; (1)

PHS _A S _B (i1,j2) = PHS _B [j2] - PHS _A [i1]; (2)

PHS _A S _B (i2,j1) = PHS _B [j1] - PHS _A [i2]; (3)

PHS _A S _B (i2,j2) = PHS _B [j2] - PHS _A [i2]; (4)

According to the above formula (1)-formula (4), the following equation (5) can be obtained:

PHS _A S _B (i1,j1) + PHS _A S _B (i2,j2) = PHS _A S _B (i1,j2) + PHS _A S _B (i2,j1); (5)

Therefore, for any range combination in the form of a second-order matrix, when the phase calibration parameters of three range combinations are determined, the phase calibration parameters of another range combination can be calculated by the above equation (5).

The inventor of the present application also found that when the effective value of the signal input reaches 10% of the range amplitude, the impact on the phase measurement characteristics can be ignored. In particular, when the effective value of the signal input reaches 40% of the range amplitude, there is almost no impact on the phase measurement characteristics. Therefore, using the above characteristics, when the smaller range between adjacent ranges reaches 10% of the full-scale amplitude of the larger range, a combination of adjacent ranges is selected, and the zero phase characteristics of the channel input signal are used to directly measure the two The phase calibration parameters of three combinations of the first-order matrix range combinations are then calculated through the above equation (5) to calculate the phase calibration parameters of another range combination. By analogy, the phase calibration parameters of all range combinations can be obtained through step-by-step calculations, thus getting rid of the limitation of using a voltage divider or shunt when the range span is large.

Figure 4 provides a flow chart of a zero-phase calibration method according to an embodiment of the present application. The method includes: step S1, selecting a group of combinations with the same range between different channels A and channel B of the wide-range instrument, and A group of adjacent measurement range combinations consisting of a measurement range and a measurement range that is adjacent to and smaller than the measurement range, and the phase calibration parameters between the channel signals of a group of combinations of the same measurement range and between the channel signals of a group of adjacent measurement range combinations are measured ; Step S2, complete the measurement of the phase calibration parameters of all groups of combinations of the same range and groups of adjacent range combinations, and store the measured phase calibration parameters in the memory; Step S3, call the measured phase stored in the memory Calibration parameters, step by step calculate the phase calibration parameters between the channel signals of the remaining range combinations of the wide range instrument; Step S4, store the phase calibration parameters calculated in step S3 in the memory; and Step S5, perform the wide range instrument calibration When the instrument is calibrated, the corresponding phase calibration parameters stored in the memory are called to calibrate the phase zero point between different channel signals of the wide-range instrument.

According to a preferred embodiment of the present application, the ratio between the smaller range and the larger range of adjacent range combinations of the wide-range instrument reaches at least 0.1. As a non-limiting example, the ratio between the smaller range and the larger range of adjacent range combinations of the range meter may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9. Particularly preferably, the ratio between the smaller range and the larger range of adjacent range combinations of the wide range instrument is 0.4 or 0.5.

Continuing to refer to Figure 4, in step S1, the full-scale amplitude signal of the adjacent and smaller range is output by the standard source 3 to channel A and channel B of the wide-range instrument 2, and a group of combinations of the same range are measured. Phase calibration parameters PHS _A S _{B (} 1,1), PHS _A S _B (1,2), between channel signals S _{A and} S _B and between channel signals S A and S _B of a group of adjacent range combinations. …,PHS _A S _B (i,i),PHS _A S _B (i,i+1),…,PHS _A S _B (n,n), where n is the number of ranges of the wide-range instrument 2, i is an integer and 1≤i≤n-1; in step S2, complete the measurement of the phase calibration parameters of all groups of combinations of the same range and groups of adjacent range combinations, and store the measured phase calibration parameters in the memory ;In step S3, according to the equation PHS _A S _B (i1, j1) + PHS _A S _B (i2, j2) = PHS _A S _B (i1, j2) + PHS _A S _B (i2, j1), call the memory The measured phase calibration parameters stored in , use the formula PHS _A S _B (i+1,i)=PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1)-PHS _A S _B (i,i+1) calculates PHS _A S _B (i+1,i), and uses the formula PHS _A S _B (j+2,j)=PHS _A S _B (j+1,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1,j+1) calculates PHS _A S _B (j+2,j), using the formula PHS _A S _B (j,j +2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1,j+1)Calculate PHS _A S _B ( j,j+2), where j is an integer and 1≤j≤n-2, and so on, the phase calibration parameters between the channel signals S _A and S _B of the remaining range combinations of the wide-range instrument are calculated step by step .

Referring to Figure 5, Figure 5 is a matrix diagram of phase calibration parameters between channel signals of each range combination when performing calibration using the zero phase calibration method provided by an embodiment of the present application. Among them, n is the number of range files of wide-range instrument 2, n is an integer and n≥3, i and j respectively represent the i-th range file and j-th range file of channel CH _A or channel CH _B of wide-range instrument 2, i and j are both integers and 1≤i<j≤n-1. The range combination in the matrix diagram consists of a certain range file of channel CH _A and a certain range file of channel CH _B. In each range combination of channel CH _A and channel CH _B , the phase calibration parameters between the channel signals S _A and S _B of the range combination identified by the letter M in the matrix diagram are directly measured using the standard source in the above step S1. The parameters obtained, the phase calibration parameters between the channel signals S _A and S _B of the range combination identified by the letter C in the matrix diagram are based on the equation PHS _A S _B (i1,j1)+PHS _A S in the above step S3 _B (i2, j2) = PHS _A S _B (i1, j2) + PHS _A S _B (i2, j1) parameters calculated step by step.

Referring to Figures 3 to 5 at the same time, in the calibration environment of the zero-phase calibration method as shown in Figure 3, when the computer device 1 adopts the zero-phase calibration method of the present application to measure the different channels CH A and CH _A of the wide-range instrument 2 When calibrating the phase zero point between channels CH _B , first select a group of combinations with the same range between the two different channels CH _A and channel CH _B of the wide-range instrument 2, and the combination of the range and the adjacent and larger range A group of adjacent range combinations consisting of small ranges uses computer equipment 1 to control the standard source 3 to output the full-scale amplitude signal of the adjacent and smaller range. The two signals are simultaneously input into the channel CH _A and channel of the wide-range instrument 2 In CH _B , the phase calibration parameters between a group of channel signals S _A and _SB of the same range combination and between a group of channel signals S _A and S _B of adjacent range combinations are measured (by the matrix of Figure 5 (marked by the letter M in the figure), the measured phase calibration parameters are transmitted to the memory of the computer device 1 for storage through the interface of the wide-range instrument 2; then, the phases of all group combinations of the same range and groups of adjacent range combinations are completed After the calibration parameters are measured and the measured phase calibration parameters are stored in the memory, the processor of the computer device 1 calls the measured phase calibration parameters stored in the memory to calculate the remaining value of the wide range instrument 2 step by step according to the above equation (5). The phase calibration parameters (identified by the letter C in the matrix diagram of Figure 5) between the channel signals S _A and S _B of each range combination are stored in the memory of the computer device 1; finally, the computer device 1 calls the memory The corresponding stored phase calibration parameters automatically calibrate the phase zero point between channel CH _A and channel CH _B of wide range instrument 2. It should be noted that the computer device 1 can communicate with the standard source 3 through the USB interface to control the output signal of the standard source 3. The communication methods between the standard source 3 and the computer device 1 include but are not limited to GPIB mode and RS232 mode.

The wide-range instrument 2 in this specification has multiple channels, each channel has more than two measuring ranges, and the measuring range amplitudes of the corresponding measuring ranges of each channel are equal. The channel measurement signals of such wide-range, multi-channel instruments can be AC voltage signals or AC current signals. Non-limiting examples of the wide range instrument 2 include: a multi-channel vector voltage analyzer with a voltage range of 2mV-5V; a multi-channel phase meter with a voltage range of 10mV-630V; a three-phase voltage range of 60V-720V Standard electric energy meter; power analyzer with a voltage range of 50mV-1000V and a current range of 5mA-30A.

According to the preferred embodiment of the present application, the wide-range instrument 2 is a multi-channel vector voltage analyzer with a range number n of 11, in which the ranges of the two voltage measurement channels are set to [5V, 2V, 1V, 500mV, 200mV, 100mV, 50mV, 20mV, 10mV, 5mV, 2mV]. In the following, a phase calibration experiment is performed on the vector voltage analyzer according to the method described in this application to verify the effectiveness of the method in this application.

Experimental data

For the typical calibration environment of the vector voltage analyzer model TH2000 developed by the applicant of this application, the experiment selected three signal frequencies of standard source 3 as the input voltage signal frequencies of the vector voltage analyzer: power frequency 53Hz, intermediate frequency 1kHz and high frequency. Frequency 10kHz. The experiment selects the calibration parameters measured and calculated at an intermediate frequency of 1kHz as the benchmark. First, the phase calibration parameters between a group of channel signals of the same range combination and a group of adjacent range combinations of channel signals are measured, and all groups are completed. After measuring the phase calibration parameters of combinations of the same range and groups of adjacent range combinations and storing the measured phase calibration parameters in the memory, the measured phase calibration parameters stored in the memory are called to calculate step by step the remaining parameters of the wide range instrument. The phase calibration parameters between the channel signals of each range combination are stored in the memory; then, the corresponding phase calibration parameters stored in the memory are called to automatically calibrate the phase zero point between the channels of the vector voltage analyzer.

Table 2 below is the phase calibration parameter table measured and calculated at an intermediate frequency of 1kHz (unit: nanosecond [ns], RG1 represents the selected range of channel CH _A signal S _A , RG2 represents the selected range of channel CH _B signal S _B ) .

Table 2: Phase calibration parameter table

It should be noted that the underlined values in Table 2 above belong to directly measured phase calibration parameters (the ratio between the smaller range and the larger range of the adjacent range combination is 0.4 or 0.5), and other values belong to the phase calibration parameters according to this application. Phase calibration parameters calculated by the method.

The experiment also measured the actual phase difference before calibration for the range combinations including the 100mV and above ranges where the ratio between the smaller range and the larger range reaches 0.1, and converted into angles with the corresponding data listed in Table 2 above. The values are then compared to evaluate the impact of measurement error. The results show that at a power frequency of 53Hz, the phase error is within 2μrad; at a medium frequency of 1kHz, the phase error is within 1μrad; at a high frequency of 10kHz, the phase error is within 10μrad. It is well known to those skilled in the art that the above error value is within a negligible range at the corresponding frequency. From this, it can be verified that as argued above in this application, when the effective value of the signal input reaches 10% of the range amplitude, the impact on the phase measurement characteristics can be ignored.

The following selects data that meets the requirements from the phase difference measured after the vector voltage analyzer writes the phase calibration parameters to evaluate the effectiveness of the zero-phase calibration method of this application.

Specifically, Table 3 below is the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 (unit: μrad, RG1 represents channel CH _A signal S _A when the input signal is 53Hz power frequency) Selected range, RG2 represents channel CH _B signal S _B selected range). It should be noted that the range combinations without slashes in Table 3 meet the requirement that the ratio between the smaller range and the larger range reaches 0.1. The measured values of the phase difference listed in such range combination boxes are quite accurate. Can be used to evaluate phase alignment. The range combinations marked with slashes in Table 3 do not meet the requirement that the ratio between the smaller range and the larger range reaches 0.1, and the measured phase difference value may have a large error, which is listed in the table for reference.

Table 3: Phase difference measured after writing phase calibration parameters at power frequency 53Hz

It can be seen from the data in Table 3 that under the power frequency of 53Hz, the absolute value of the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 obtained according to the method of this application is very small. Among the range combinations without slashes, the absolute value of the phase difference of the range combinations that only include the range 100mV and above is within 2 μrad, and the absolute value of the phase difference of the range combinations that only include the range below 100mV is within 10 μrad. It is well known to those skilled in the art that such a phase difference value is within a basically negligible range at the corresponding frequency and range. Therefore, it can be judged that the phase difference has returned to zero after the vector voltage analyzer is calibrated.

Table 4 below shows the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 when the input signal is an intermediate frequency of 1kHz (unit: μrad, RG1 represents the selected range of channel CH _A signal S _A , RG2 Represents channel CH _B signal S _B selected range). Similarly, the range combinations that are not hatched in Table 4 meet the requirement that the ratio between the smaller range and the larger range reaches 0.1 and can be used to evaluate the phase calibration. It can be seen from the data in Table 4 that at an intermediate frequency of 1 kHz, the absolute value of the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 obtained according to the method of this application is very small. Among the range combinations without slashes, the absolute value of the phase difference of the range combinations that only include the range of 100mV and above is within 1μrad, and the absolute value of the phase difference of the range combinations that only include the ranges below 100mV is within 10μrad. It is well known to those skilled in the art that such a phase difference value is within a basically negligible range at the corresponding frequency and range. Therefore, it can be judged that the phase difference has returned to zero after the vector voltage analyzer is calibrated.

Table 4: Phase difference measured after writing phase calibration parameters at intermediate frequency 1kHz

Table 5 below shows the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 when the input signal is a high frequency 10kHz (unit: μrad, RG1 represents the selected range of channel CH _A signal S _A , RG2 represents the channel CH _B signal S _B selected range).

Table 5: Phase difference measured after writing phase calibration parameters at high frequency 10kHz

Similarly, the range combinations that are not hatched in Table 5 meet the requirement that the ratio between the smaller range and the larger range reaches 0.1 and can be used to evaluate the phase calibration. It can be seen from the data in Table 5 that at a high frequency of 10 kHz, the absolute value of the phase difference measured by the vector voltage analyzer after writing the phase calibration parameters listed in Table 2 obtained according to the method of this application is very small. Among the range combinations without slashes, the absolute value of the phase difference of the range combinations that only include the range 100mV and above is within 10 μrad, and the absolute value of the phase difference of the range combinations that only include the range below 100mV is within 50 μrad. It is well known to those skilled in the art that such a phase difference value is within a basically negligible range at the corresponding frequency and range. Therefore, it can be judged that the phase difference has returned to zero after the vector voltage analyzer is calibrated.

Therefore, it can be seen from the above experiments that the zero-phase calibration method of the present application can effectively calibrate the phase zero points between different channel signals of wide-range instruments at various frequencies.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; under the idea of the present application, the above embodiments or the technical features in different embodiments can also be combined, and the steps It may be implemented in any order, and there are many other variations of the different aspects of the application as described above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will It is understood that the technical solutions described in the foregoing embodiments can still be modified, or some of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technology of the embodiments of the present application. Scope of the program. For those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application.

It should be understood that although various steps in the flowchart of FIG. 4 are shown in sequence as indicated by arrows, these steps are not necessarily executed in the order indicated by arrows. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figure 4 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution of these sub-steps or stages The sequence is not necessarily sequential, but may be performed in turn or alternately with other steps or sub-steps of other steps or at least part of the stages.

A computer device includes a memory and one or more processors. Computer-readable instructions are stored in the memory. When the computer-readable instructions are executed by the processor, they cause one or more processors to perform the following steps:

Step S1, between different channels A and channel B of the wide-range instrument, select a group of combinations with the same range, as well as a group of adjacent range combinations composed of a range and a smaller range adjacent to the range, and measure Phase calibration parameters between a group of channel signals of the same range combination and between a group of channel signals of adjacent range combinations;

Step S2: Complete the measurement of the phase calibration parameters of all groups of combinations of the same range and groups of adjacent range combinations, and store the measured phase calibration parameters in the memory;

Step S3, call the measured phase calibration parameters stored in the memory, and gradually calculate the phase calibration parameters between the channel signals of the remaining range combinations of the wide-range instrument;

Step S4, store the phase calibration parameters calculated in step S3 in the memory; and

Step S5, when calibrating the wide-range instrument, call the corresponding phase calibration parameters stored in the memory to calibrate the phase zero points between different channel signals of the wide-range instrument.

In some embodiments, the ratio between the smaller range and the larger range of adjacent range combinations of the wide range instrument reaches at least 0.1.

In some embodiments, in step S1, the standard source outputs the full-scale amplitude signal of the adjacent and smaller range to channel A and channel B of the wide-range instrument, and a group of combined channels of the same range is measured. Phase calibration parameters PHS _{A S B (1,1), PHS A S B ( 1,2 ) ,} … ,PHS _A S _B (i,i),PHS _A S _B (i,i+1),…,PHS _A S _B (n,n), where n is the number of ranges of the wide-range instrument, and i is an integer And 1≤i≤n-1.

In some embodiments, in step S3, according to the equation PHS _A S _B (i1, j1) + PHS _A S _B (i2, j2) = PHS _A S _B (i1, j2) + PHS _A S _B (i2, j1), call the measured phase calibration parameters stored in the memory, using the formula PHS _A S _B (i+1,i)=PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1 )-PHS _A S _B (i,i+1) calculates PHS _A S _B (i+1,i), and uses the formula PHS _A S _B (j+2,j)=PHS _A S _B (j+1 ,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1,j+1) to calculate PHS _A S _B (j+2,j), using the formula PHS _A S _B (j,j+2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1,j+1)Calculated PHS _A S _B (j,j+2), where j is an integer and 1≤j≤n-2, and so on, calculate step by step the channel signals S _A and S _B of the remaining range combinations of the wide-range instrument phase calibration parameters.

In some embodiments, the ratio between the smaller range and the larger range of adjacent range combinations of the wide range meter is 0.4 or 0.5.

In some embodiments, the channel signal is an AC voltage signal.

A computer-readable storage medium on which computer-readable instructions are stored. When executed by a processor, the computer-readable instructions cause one or more processors to perform the following steps:

Step S1, between different channels A and channel B of the wide-range instrument, select a group of combinations with the same range, as well as a group of adjacent range combinations composed of a range and a smaller range adjacent to the range, and measure Phase calibration parameters between a group of channel signals of the same range combination and between a group of channel signals of adjacent range combinations;

Step S2: Complete the measurement of the phase calibration parameters of all groups of combinations of the same range and groups of adjacent range combinations, and store the measured phase calibration parameters in the memory;

Step S3, call the measured phase calibration parameters stored in the memory, and gradually calculate the phase calibration parameters between the channel signals of the remaining range combinations of the wide-range instrument;

Step S4, store the phase calibration parameters calculated in step S3 in the memory; and

Step S5, when calibrating the wide-range instrument, call the corresponding phase calibration parameters stored in the memory to calibrate the phase zero points between different channel signals of the wide-range instrument.

In some embodiments, the ratio between the smaller range and the larger range of adjacent range combinations of the wide range instrument reaches at least 0.1.

In some embodiments, in step S1, the standard source outputs the full-scale amplitude signal of the adjacent and smaller range to channel A and channel B of the wide-range instrument, and a group of combined channels of the same range is measured. Phase calibration parameters PHS _{A S B (1,1), PHS A S B ( 1,2 ) ,} … ,PHS _A S _B (i,i),PHS _A S _B (i,i+1),…,PHS _A S _B (n,n), where n is the number of ranges of the wide-range instrument, and i is an integer And 1≤i≤n-1.

In some embodiments, in step S3, according to the equation PHS _A S _B (i1, j1) + PHS _A S _B (i2, j2) = PHS _A S _B (i1, j2) + PHS _A S _B (i2, j1), call the measured phase calibration parameters stored in the memory, using the formula PHS _A S _B (i+1,i)=PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1 )-PHS _A S _B (i,i+1) calculates PHS _A S _B (i+1,i), and uses the formula PHS _A S _B (j+2,j)=PHS _A S _B (j+1 ,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1,j+1) to calculate PHS _A S _B (j+2,j), using the formula PHS _A S _B (j,j+2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1,j+1)Calculated PHS _A S _B (j,j+2), where j is an integer and 1≤j≤n-2, and so on, calculate step by step the channel signals S _A and S _B of the remaining range combinations of the wide-range instrument phase calibration parameters.

In some embodiments, the ratio between the smaller range and the larger range of adjacent range combinations of the wide range meter is 0.4 or 0.5.

In some embodiments, the channel signal is an AC voltage signal.

Those of ordinary skill in the art can understand that all or part of the processes in implementing the methods of the above embodiments can be completed by instructing relevant hardware through computer-readable instructions. The computer-readable instructions can be stored in a non-volatile computer-readable device. When being retrieved from the storage medium, the computer-readable instructions may include the processes of the above method embodiments when executed. Any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and/or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims (14)

1. A zero-phase calibration method for calibrating phase zero between different channel signals of a wide-range instrument, the method comprising:

step S1, selecting a combination of groups of identical ranges among different channels A and B of the wide-range meter, and a group of adjacent range combinations formed by the ranges and the ranges adjacent to the ranges and smaller than the ranges, outputting full-range amplitude signals of the adjacent ranges and smaller than the ranges to the channels A and B of the wide-range meter through a standard source, and measuring channel signals S of the combination of groups of identical ranges _A 、S _B Channel signals S between and among the adjacent range combinations _A 、S _B Phase calibration parameter PHS between _A S _B (1,1),PHS _A S _B (1,2),…，PHS _A S _B (i,i),PHS _A S _B (i,i+1)，…，PHS _A S _B (n, n), wherein n is the number of measuring range grades of the wide-range instrument, i is an integer, and i is more than or equal to 1 and less than or equal to n-1;

step S2, finishing the measurement of all phase calibration parameters of the group combination with the same measuring range and the group combination with adjacent measuring ranges, and storing the measured phase calibration parameters in a memory;

step S3, according to the equation PHS _A S _B (i1,j1)+PHS _A S _B (i2,j2)＝PHS _A S _B (i1,j2)+PHS _A S _B (i 2, j 1) calling said measured phase calibration parameter stored in said memory using the formula PHS _A S _B (i+1,i)＝PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1)-PHS _A S _B (i, i+1) calculation of PHS _A S _B (i+1, i), and employs the formula PHS _A S _B (j+2,j)＝PHS _A S _B (j+1,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1 ) calculation of PHS _A S _B (j+2, j) using the formula PHS _A S _B (j,j+2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1 ) computationPHS-out _A S _B (j, j+2), wherein j is an integer and 1.ltoreq.j.ltoreq.n-2, and so on, gradually calculating the channel signal S of each remaining range combination of the wide-range meter _A 、S _B Phase calibration parameters between;

step S4, the phase calibration parameters calculated in the step S3 are stored in the memory; and

And S5, when the wide-range instrument is calibrated, the corresponding phase calibration parameters stored in the memory are called to calibrate the phase zero points among different channel signals of the wide-range instrument.

2. The method of claim 1, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is at least 0.1.

3. The method of claim 2, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is 0.4 or 0.5.

4. A method according to claim 3, wherein the channel signal is an ac voltage signal.

5. A method according to claim 3, wherein the channel signal is an alternating current signal.

6. The method of claim 4, wherein the wide-range meter has a range n of 11, and wherein the ac voltage signal is measured in a range of 2mV to 5V.

7. A computer device comprising a memory and one or more processors, the memory having stored therein computer-readable instructions that, when executed by the one or more processors, cause the one or more processors to perform the steps of:

step S1, selecting a combination of groups of identical ranges among different channels A and B of a wide-range meter, and a group of adjacent range combinations consisting of the ranges and the ranges adjacent to the ranges and smaller than the ranges, outputting full-range amplitude signals of the adjacent ranges and smaller than the ranges to the channels A and B of the wide-range meter through a standard source, and measuring channel signals S of the combination of groups of identical ranges _A 、S _B Channel signals S between and among the adjacent range combinations _A 、S _B Phase calibration parameter PHS between _A S _B (1,1),PHS _A S _B (1,2),…，PHS _A S _B (i,i),PHS _A S _B (i,i+1)，…，PHS _A S _B (n, n), wherein n is the number of measuring range grades of the wide-range instrument, i is an integer, and i is more than or equal to 1 and less than or equal to n-1;

step S2, finishing the measurement of all phase calibration parameters of the group combination with the same measuring range and the group combination with adjacent measuring ranges, and storing the measured phase calibration parameters in a memory;

step S3, according to the equation PHS _A S _B (i1,j1)+PHS _A S _B (i2,j2)＝PHS _A S _B (i1,j2)+PHS _A S _B (i 2, j 1) calling said measured phase calibration parameter stored in said memory using the formula PHS _A S _B (i+1,i)＝PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1)-PHS _A S _B (i, i+1) calculation of PHS _A S _B (i+1, i), and employs the formula PHS _A S _B (j+2,j)＝PHS _A S _B (j+1,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1 ) calculation of PHS _A S _B (j+2, j) using the formula PHS _A S _B (j,j+2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1 ) calculation of PHS _A S _B (j, j+2), wherein j is an integer and 1.ltoreq.j.ltoreq.n-2, and so on, calculating each remaining range of the wide-range meter step by stepCombined channel signal S _A 、S _B Phase calibration parameters between;

step S4, the phase calibration parameters calculated in the step S3 are stored in the memory; and

And S5, when the wide-range instrument is calibrated, the corresponding phase calibration parameters stored in the memory are called to calibrate the phase zero points among different channel signals of the wide-range instrument.

8. The computer device of claim 7, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is at least 0.1.

9. The computer device of claim 8, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is 0.4 or 0.5.

10. The computer device of claim 9, wherein the channel signal is an alternating voltage signal.

11. One or more non-transitory computer-readable storage media storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of:

step S1, selecting a combination of groups of identical ranges among different channels A and B of a wide-range meter, and a group of adjacent range combinations consisting of the ranges and the ranges adjacent to the ranges and smaller than the ranges, outputting full-range amplitude signals of the adjacent ranges and smaller than the ranges to the channels A and B of the wide-range meter through a standard source, and measuring channel signals S of the combination of groups of identical ranges _A 、S _B Channel signals S between and among the adjacent range combinations _A 、S _B Phase calibration parameter PHS between _A S _B (1,1),PHS _A S _B (1,2),…，PHS _A S _B (i,i),PHS _A S _B (i,i+1)，…，PHS _A S _B (n, n), wherein n is the number of measuring range grades of the wide-range instrument, i is an integer, and i is more than or equal to 1 and less than or equal to n-1;

step S2, finishing the measurement of all phase calibration parameters of the group combination with the same measuring range and the group combination with adjacent measuring ranges, and storing the measured phase calibration parameters in a memory;

step S3, according to the equation PHS _A S _B (i1,j1)+PHS _A S _B (i2,j2)＝PHS _A S _B (i1,j2)+PHS _A S _B (i 2, j 1) calling said measured phase calibration parameter stored in said memory using the formula PHS _A S _B (i+1,i)＝PHS _A S _B (i,i)+PHS _A S _B (i+1,i+1)-PHS _A S _B (i, i+1) calculation of PHS _A S _B (i+1, i), and employs the formula PHS _A S _B (j+2,j)＝PHS _A S _B (j+1,j)+PHS _A S _B (j+2,j+1)-PHS _A S _B (j+1 ) calculation of PHS _A S _B (j+2, j) using the formula PHS _A S _B (j,j+2)＝PHS _A S _B (j,j+1)+PHS _A S _B (j+1,j+2)-PHS _A S _B (j+1 ) calculation of PHS _A S _B (j, j+2), wherein j is an integer and 1.ltoreq.j.ltoreq.n-2, and so on, gradually calculating the channel signal S of each remaining range combination of the wide-range meter _A 、S _B Phase calibration parameters between;

step S4, the phase calibration parameters calculated in the step S3 are stored in the memory; and

And S5, when the wide-range instrument is calibrated, the corresponding phase calibration parameters stored in the memory are called to calibrate the phase zero points among different channel signals of the wide-range instrument.

12. The storage medium of claim 11, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is at least 0.1.

13. The storage medium of claim 12, wherein a ratio between a smaller span and a larger span of the adjacent span combination of the wide-span meter is 0.4 or 0.5.

14. The storage medium of claim 13, wherein the channel signal is an alternating voltage signal.